The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Feb. 17, 2009
Michael Baumgartner, Montlingen, CH;
Albert Loichinger, Sax, CH;
Michael Baumgartner, Montlingen, CH;
Albert Loichinger, Sax, CH;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A self-drilling screw () has a thread-carrying shaft (), a head () provided at one of its ends, and a drilling tip () provided at another of its ends, opposite the one end thereof, with the drilling tip () having first and second cutting edges () and first and second chip channels () associated with the first and second cutting edges (), respectively, beginning at first and second start points () at the free end () of the drilling tip (), and located on opposite first and second sides of the drilling tip (), with the first and second start points () being spaced from the center (Z) of the drilling tip () by a mean distance (X) corresponding to from 0.01 to 0.15 of the drilling tip diameter (D), and being spaced from each other by a maximum distance (Y) corresponding to from 0 to 0.8 of the mean distance (X).